Electronic control keyboard



FIG. 1 is a top, front, left side perspective view of an electronic control keyboard showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an electronic control keyboard, as shown and described. 